Paper-cutting machine



(No Model.)

2 Sheets-Sheet 1.

V H. P. PEISTER.

PAPER CUTTING MAGHINE.

m Patented May 9, 1882.

N PETERS. Phnla-Lilhogrwhor. Washingiun. D c.

(No ModelQ) Q Sheets-Sheet 2.

H. P. PEI$TER. PAPER CUTTING MAUHINE.

No. 257,682. Patented May 9, 1882.

X -Eventful N, ifETERS, Fhnto-Lilhngmpher. Washington. D. C.

UNITED STATES P TENT OFFICE.

HENRY P. FEISTER, ()F PHILADELPHIA, PENNSYLVANIA.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 257,682, dated Ilfay '9, I882.

Application filed September 1, 1880.

(No model.)

to provide an automatic clamping medium capable of accommodating itself automatically to various thicknesses'of paper or books and securely clamping or holding the same while hein g cut or trimmed; second, to insure perfect clamping and holding of the paper without using screws or extreme frictional surfaces to attain that object. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figurelisafrontelevation with parts broken away to better facilitate sbowing the more obscure working parts. Fig. 2 is a vertical section taken on line was of Fig.

Similar letters refer to similar parts thron gh out the several views.

The housings H H, cap S, and front braceplate, H constitute the framework of the ma chine, housings H H being slotted entirely through for the horizontal travel of knifebar It. The said knife-bar R has a reciprocating motion in precisely horizontal direction. be

tween the rollers 1% R R It, the knife-bar It having no vertical motion whatever. The rollers R rotate in stationary lugs cast on the outsides ofhousingsHH. The table T, upon which the paper is placed to be cut, is fitted with connections F F, piston-yoke Y Y Y, tableguides F F, and slotted crank-pin extension M. The table has a vertical reciprocating motion imparted to it through the gearing N N slotted table-extension M, and crank-pin m, and driving-shaft c. The-housings H H are fitted with suitable vertical grooves on their insides to accommodate the vertical traverse of table-guides F F, connections F F, and ends of clamping-bar E E E.

In niches near each end of yoke Y Y Y, and secured jointedly in the top of said niches, are air-pistons I I, which partake of the same reciprocating motion imparted to yoke Y and table T.

On the insides of housings H H are stop-pins L L. E E. The said clamping-bar E always rests on the stop-pins L, save when forced away by contact with paper P through the upward vmovement of table T. Upon seats or projections cast on the rear side of clamping-bar E are secured air-cylinders O G, havinga caliber suitable to the diameters of pistons I I, previously referred to. The pistons I I are packed air-tightin the cylinders G G, and when the table .is at the lower end of its stroke the said pistons I I remain at restslightly above the air-inlets at the bottoms of air-cylinders U O, save when they are drawn upward or downward in their cylinders by the reciprocating motion of yoke Y and table T, previously referred to. The

clamping-bar E is also provided with inclined slot A, placed at an angle of forty-five degrees with its base. In this inclined slot A, and secured fixedly in knife-bar R, are a pin and friction-roller, Q, the roller Q, always working in the inclined slot A, which, by the vertical reciprocating motion of clamping-bar E, imparts a horizontal reciprocating motion to knife-bar R, the movement ofclampingbar E and knife-bar R always beingin proportion to the thickness of or heightof paper P on table '1, there being nomovement of clampingbar E except that given it by the thickness of paper on table T. In fact, there would be no movement. at all of clamping-bar E if no paperwere placed on table T. The clamping-bar E is also provided with a vertical groove,W, which fits upon and slides on adownward-projecting tongue, W, cast on yoke Y, which serves to guide clamping-bar E and maintain it parallel with the table T, the housings H B being also grooved on their insides for the reception of the ends of clamping-bar E.

On top of the machine-cap is secured aircylinder D, fitted with the piston S, whose rod X is connected with tongue W on top of yoke Y. This piston S partakes of the same motion (reciprocating) imparted to yoke Y and table T, and is used for a twofold purpose: First, compressed air being admitted at the port D, it counteracts the weight of table T and its connections; second, it assists the gearing N Upon these pins rests clamping-bar E N in forcing the table upward and carrying paper I? first against clamp E and clamping the paper, then againstthe cutting-edge of the knife-bar R and cutting the paper. Hence the same air-pressure generated in receiver B to clamp the paper or actuate the clampingbar E also assists in an equal ratio in helping to cut the paper.

The method of generating, controlling, and using the compressed air is fully shown in the vertical section, Fig. 2, in which A is the airpump; B, its receiver; U, an eccentric, for drivingpumpA; V, the controlling-valve; 0, starting-lever; O unshipping-bar; O valve-connecting rod a, unshipping-cam; 6, drivingshaft; N N, clutches; L L L, air-conducting pipe, and G G flexible rubber connections. The air-pump A is fitted with a suitable inletvalve, the outlet-valve communicating with reeeiver B and retaining the compressed air as it is forced therein by the rotary motion of drivin g-shat't e and eccentric U.

The object and uses of lever O and clutch mechanism are as follows, and will be readily understood by all users of paper-cutting machines. It is desirable that after the table T has been forced upward, the paper out, and the table again returned to the lower end of its stroke, it should automatically stop there. This is accomplished by cam n oflarge gear N coming in contact with and moving unshipping-bar 0 carrying with it lever O, clutch N, and valve-connecting rod The valve V of connecting-pipe L is fitted with suitable two-way induction and exhaust ports. These ports are so arranged that communication between receiver B and'air-cylinders C G and D is controlled by the oscillating motion of valve V, thus admitting com pressed air from receiver B to air-cylinders (J O and'D to clamp and assist in cutting the paper P, and again automatically exhausting the air from the cylinders alter the paper has been clamped and cut by contact of cam 10 with unshipping-bar 0 The operation of my invention is as follows: Rotary motion being imparted to shaft 0, carrying eccentric U, the receiver B is quickly charged with compressed air by pump A; but no motion is imparted to the cutting-gearing of the machine, as the shalt 0 runs idle in pinion-gear N, while clutch N slides on a spline and always rotates with shaft 0, so that when the operator pulls toward him lever 0 it carries with it clutch N, engaging clutch N of pinion-gear N, which starts the cutting and clamping parts of the machine. It must also be observed that when the operator pulls toward him lever O to engage the clutch-movement he also (through connection 0 moves or oscillates valve V and opens communication with receiver B and air-cylinders O O and D. Thus the air admitted to cylinders O (3 acts in opposite directions between pistons I I and bottoms of cylinders O O. The cylinders 0 0, being mounted upon the clamping-bar E, will keep it pressed do'wn firmly against stop-pins L L in proportion to the amount of air-pressure contained in cylinders G 0. -Now, as the table T, carrying paper P, continues on its upward way, the paper will come against clamp E and become clamped perfectly tight, after which clamp E will be lifted off its stop-pins L Land travel with table T until the upper end of the stroke is reached and the paper cut, when clamp E and table T continue on the downward stroke together until clamping-bar E is arrested by the stop-pins, when the table continues to the lower end of its stroke. The cam 42 on gear N now comes in contact with unshipping-bar O pushing it outward, disengaging clutch N, at the same time reversing valve V and exhausting the air from cylinders G O and I), leaving the paper free from the clamping-bar E.

Having now fully described my invention, Ielaim as new--- 1. The clamp E, in combination with air-cylinders O O, pistons I I, flexible rubber connections Gr G, and conducting-pipes L, substantially as shown and described.

2. In a paper-cutting machine, the combination, with yoke Y and table T, of air-cylinder D, piston S, and rod X, adapted to operate, as and for the purpose set forth.

3. In a paper-cutting machine, the combination, with clamping-bar E and yoke Y, respect; ively, ot' air-cylinders O O, pistons I I, airpipes L, flexible connections G G, and airvalve V, adapted to operate substantially as set forth.

4. The combination of starting-lever 0, unshippiug-bar O cam n, connecting-rod O and two-way air-valve V, all substantially as set forth.

HENRY I. FEISTER.

Witnesses:

FRANK BoBINsoN, J OSEPH J. BROADHURST. 

